kieranpage
Member
Good evening all, I lurk around here a lot looking for glimpses of help for my Lupo 3L I belive is shares its engine with the A2 3L. Anyway, im hoping someone on here can back up a theory i have about an issue wiht my 3L. I am struggeling to find info becuase most of the owners sites are in German or Dutch.. Anyway, here goes,
This week my lupo started using a lot of hydraulic fluid, it was leaking out at quite a rate. On investigation today it appears that the fluid is being forced out of the expansion tank relief hole. I have removed the expansion tank and the oil is weaping from the connection to the clutch slave solenoid valve. Marked as "T" on Pg 10 of this pdf.
http://www.volkspage.net/technik/ssp/ssp/SSP_221.pdf
Video of my leak. Hardly any pressure in the system, most of the oil has been purged.
https://www.youtube.com/watch?v=5JijG30LJIM
Does anyone know what could cause this, under pressure a lot of fluid is being forced out of the relief hole in a pulsating motion. I have developed a theory, but id like someone with expertise to confirm or call me a idiot.
I have a feeling that all of this can be traced back to the door switch. The one that detects if the door is open. It also acts to start the hydraulic pump so that the pressure is built up by the time you start the car.
*My switch failed a couple of months ago. My pump only initialises now with the ignition going on. This means you can start and potentially drive away with low pressure.
What happens is that you select a gear, release the brake and press the accelerator. With low pressure the gear hasn't been selected but the car tries to move. When nothing happens the car thinks the clutch hasn't bitten. So it adjustes the bite point. *The problem is that it was wrong, and the clutch is now incorrectly adjusted. The car is violent to pull away or in the worst case stalls.
So. According to page 10 of the PDF. The connection in my video that's leaking goes to the clutch slave solenoid valve. If you read on it says that it can have a position that's 20% clutch bite.
Now, I think my car has potentially adjusted itself so that this solenoid is not fully closing and allowing constant pressure back into the expansion tank
If I'm right, I wd40 a switch in the door lock, refill with oil, and perform a basic gearbox setting and all should be ok in the future.
sorry for the long post, im kinda lost in a sea of German and Dutch forum posts
Cheers
Kieran
This week my lupo started using a lot of hydraulic fluid, it was leaking out at quite a rate. On investigation today it appears that the fluid is being forced out of the expansion tank relief hole. I have removed the expansion tank and the oil is weaping from the connection to the clutch slave solenoid valve. Marked as "T" on Pg 10 of this pdf.
http://www.volkspage.net/technik/ssp/ssp/SSP_221.pdf
Video of my leak. Hardly any pressure in the system, most of the oil has been purged.
https://www.youtube.com/watch?v=5JijG30LJIM
Does anyone know what could cause this, under pressure a lot of fluid is being forced out of the relief hole in a pulsating motion. I have developed a theory, but id like someone with expertise to confirm or call me a idiot.
I have a feeling that all of this can be traced back to the door switch. The one that detects if the door is open. It also acts to start the hydraulic pump so that the pressure is built up by the time you start the car.
*My switch failed a couple of months ago. My pump only initialises now with the ignition going on. This means you can start and potentially drive away with low pressure.
What happens is that you select a gear, release the brake and press the accelerator. With low pressure the gear hasn't been selected but the car tries to move. When nothing happens the car thinks the clutch hasn't bitten. So it adjustes the bite point. *The problem is that it was wrong, and the clutch is now incorrectly adjusted. The car is violent to pull away or in the worst case stalls.
So. According to page 10 of the PDF. The connection in my video that's leaking goes to the clutch slave solenoid valve. If you read on it says that it can have a position that's 20% clutch bite.
Now, I think my car has potentially adjusted itself so that this solenoid is not fully closing and allowing constant pressure back into the expansion tank
If I'm right, I wd40 a switch in the door lock, refill with oil, and perform a basic gearbox setting and all should be ok in the future.
sorry for the long post, im kinda lost in a sea of German and Dutch forum posts
Cheers
Kieran